GADUD, bez, uzvhoi hayvonot va odam, ki moddahoi makhsus (gormonho, luob, obi dahon, mushk va g.) hosil va khorij mekunand. Mahsuli G. dar funksiyahoi gunoguni fiziologi va biokhimiyavii organizm ishtirok menamoyand. G.-hoe, ki mahsulashonro tavassuti majro ba rui pust yo pardahoi luobi khorij mekunand, gadudhoi usorai beruni yo ekzokrini nomida meshavand; mahsuli chunin G. usora nom dorad.
G.-hoe, ki majro nadorandu mahsulashonro (inkretho yo gormonho) bevosita ba khun yo limfa khorij mekunand, gadudhoi usorai dokhili yo endokrini nom dorand. Baze G.-ho mahsuli okhirini mubodilaro az khun jabbida, bezarar va khorij mekunand (bo hamin roh organizm az zahroludi hifz karda meshavad). Mas., G.-hoi boloi gurda, G.-i araq, G.-i ashk va g. Usorai aksari G.-ho (mas., G.-i banogush, zeri meda) az rui tarkibi khimiyavi ba safedaho mansuband; onho dar ob hal shuda, moei serozi (zardobmonand) hosil mekunand. Onho G.-hoi safedavi yo serozi nom dorand. G.-hoi luobi (mas., G.-i surkhruda yo bachadon) mutsin yo moddahoi luobmonand khorij mekunand. Az jihati sokht G.-ho yakhujayra va serhujayra, inchunin naychashakl, hubobchamonand, naychashaklu hubobchamonand, oddi va murakkab meshavand.
SH. S. Anvarova.